CN1500995A - Centrifugal blower - Google Patents
Centrifugal blower Download PDFInfo
- Publication number
- CN1500995A CN1500995A CNA200310117907A CN200310117907A CN1500995A CN 1500995 A CN1500995 A CN 1500995A CN A200310117907 A CNA200310117907 A CN A200310117907A CN 200310117907 A CN200310117907 A CN 200310117907A CN 1500995 A CN1500995 A CN 1500995A
- Authority
- CN
- China
- Prior art keywords
- centrifugal blower
- shell
- bellmouth
- air
- inlet port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000465 moulding Methods 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A centrifugal blower (1) comprises a multiblade fan (6, 7) having a plurality of blades (5) disposed around a rotary shaft (3, 4) in the circumferential direction, and a casing (10, 11) containing the multiblade fan (6, 7), wherein air sucked through an air intake port (12, 13, 15, 16) opened on the casing (10, 11) is sucked from a radial inside to a radial outside through a portion between adjacent blades (5). In the blower (1), a bellmouth (18, 19, 20, 21) having a diameter increasing toward an outside of the casing (10, 11) is provided to the air intake port (12, 13, 15, 16). The bellmouth (18, 19, 20, 21) can be easily provided without using a complicated mold and without increase of number of parts. By the bellmouth (18, 19, 20, 21), the blast performance of the blower may be improved, and the generation of noise from the blower may be suppressed.
Description
Technical field
The present invention relates to a kind of centrifugal blower, relate more specifically to a kind of centrifugal blower that is particularly useful for vehicle air conditioner, wherein be provided with bellmouth in the air inlet port of shell.
Background technique
The conventional centrifugal blower that is used for vehicle air conditioner for example is configured to shown in Fig. 7 and 8 (for example JP-A-8-109897).In Fig. 7, centrifugal blower 100 has motor 101, is provided with sirocco fan 104 and 105 on the end of the running shaft 102 that links to each other with motor 101 and 103.Fan 104 and 105 is contained in respectively in shell 106 and 107.Be provided with air inlet port 108 and 109 in the both sides of shell 106, and be provided with air inlet port 111 and 112 in the both sides of shell 107.Be discharged into the radially outer of fan 104 through air inlet port 108 and 109 inhaled airs from the inner radial of fan 104, and be sent in the unit heater (not shown) of air-conditioning system by the flow path 110 that is formed in the shell 106.Equally, be discharged into the radially outer of fan 105 from the inner radial of fan 105, and be sent in the unit heater of air-conditioning system by the flow path 113 that is formed in the shell 107 through air inlet port 111 and 112 inhaled airs.Each shell 106 and 107 forms part 114 and 115 by two shells and forms, and they can direction shown in the arrow (footpath of sirocco fan upwards) separate in Fig. 8 each other.
In centrifugal blower, it has been generally acknowledged that if on each air inlet port, bellmouth is set, because near the air the air inlet port stops or backflow is prevented from and air flows is more stable, therefore can prevent the air blast decreased performance and when suction air, produce noise so.Yet in above-mentioned centrifugal blower, if with shell formation bellmouth is set integratedly on each shell 106 and 107, the mould structure that is used for molding outer casing so may be very complicated.Therefore, at least in aforesaid biaxial type centrifugal blower, before the present inventor studied, Shang Weiyou crossed the centrifugal blower that is provided with in each air inlet port with inlet end degree of lip-rounding all-in-one-piece bellmouth.In the single-shaft variant centrifugal blower, though cicada structure (for example JP-A-3-100399) as shown in Figure 9, wherein be provided with the bellmouth 116 that reduces towards the inside of shell 117 with inlet end degree of lip-rounding all-in-one-piece diameter at air inlet port 118 places, yet this bellmouth 116 extends towards the inside of shell 117, therefore the mould that is used for molding outer casing also becomes complicated, may need to be used for the slide mechanism of the demoulding to lay and to remove mould.In addition, especially for the biaxial type centrifugal blower, need the application of bellmouth 116 of this structure of complicated die may be difficulty.
On the other hand, be individually formed this bellmouth and be connected to after the assembling on the air inlet port even plan, especially in aforesaid biaxial type centrifugal blower, owing to have axle 102 and 103 and motor 101, therefore also be difficult to bellmouth 116 is linked to each other with 112 with each air inlet port 109.In addition, the quantity of part increases, and the cost of making blower also may increase.
Summary of the invention
Hope can provide a kind of centrifugal blower, it can easily be provided with bellmouth on each air inlet port, need not use complicated mould to come molding outer casing to form part, and can not increase the quantity of part, therefore can prevent the air blast decreased performance of blower effectively and by noise that blower produced.
Centrifugal blower according to the present invention comprises having a plurality of sirocco fans that rotate the blade that makes progress in axial week that are arranged on, and the shell that has held this sirocco fan, by opening and inhaled air is drawn onto radially outer by the part between the adjacent blades from inner radial at the air inlet port on the shell.This centrifugal blower is characterised in that, is provided with the bellmouth that diameter increases towards the outside of shell on the air inlet port.
In centrifugal blower according to the present invention, shell can be formed from a resin.In addition, bellmouth can form one with shell.Form in the structure of one at bellmouth and shell, number of spare parts than bellmouth and shell branch come formation situation still less.In addition, when molded (for example injection-molded) shell, can be molded into shell and bellmouth simultaneously.Therefore, can reduce the cost of making shell, the final cost of making whole blower that reduces.
In addition, shell can form part by a plurality of shells that can upwards separate each other in the footpath of sirocco fan and forms.For example, shell preferably forms part by two shells that can upwards separate each other in the footpath of sirocco fan and forms.Form shell by forming part by a plurality of shells, when bellmouth and shell are molded integratedly, just can form part with each shell that simple mould come easily molded bellmouth with complicated shape to form part, this mould does not have complicated structure such as sliding motion structure.Therefore, can reduce the cost of mould.In addition, do not have sliding motion structure etc., can improve the serviceability and the reliability of mould, and can improve the quality that shell forms part by making mould structure.
The present invention may be used on that sirocco fan is arranged on single-shaft variant centrifugal blower on running shaft one side and sirocco fan is arranged on each end of running shaft with in the biaxial type centrifugal blower that forms the biaxial type fan structure.Particularly, when the present invention was applied in the biaxial type centrifugal blower, the advantage that the present invention brought was especially obvious.
In above-mentioned centrifugal blower according to the present invention, owing on the air inlet port on the shell, be provided with the bellmouth that diameter increases towards the outside of shell opening, therefore just can prevent that near the air the air inlet port from stopping and backflow, and air flows is also more stable.Therefore, can prevent effectively that air blast decreased performance and the noise when air aspirates that the decline because of the suction air amount causes from producing.Because this bellmouth extends towards the outside of shell, therefore when molding outer casing forms part, can easily be molded into shell by the simple mould that does not have complicated sliding motion structure etc. and form the bellmouth part that part forms one.In addition, form one, just can prevent the increase of number of spare parts by making bellmouth part and shell form part.Particularly, form shell, just can easily form bellmouth by forming part by a plurality of shells that can upwards separate each other in the footpath of sirocco fan.
Therefore, in the present invention, can on each air inlet port, form required bellmouth easily and at low cost, need not use complicated mould structure.Particularly, by the present invention being applied in the biaxial type centrifugal blower, just can be easily and make centrifugal blower at low cost with desired properties.
Description of drawings
From the following detailed introduction of the preferred embodiments of the present invention, also with reference to the accompanying drawings, be appreciated that other features and advantages of the present invention, in the accompanying drawings:
Fig. 1 is the vertical sectional view of centrifugal blower according to an embodiment of the invention.
Fig. 2 is the side view of centrifugal blower shown in Figure 1.
Fig. 3 is the partial sectional view of amplification of a part of the air inlet port of centrifugal blower shown in Figure 1.
Fig. 4 is the enlarged side view of the sirocco fan of centrifugal blower shown in Figure 1.
Fig. 5 has shown centrifugal blower shown in Figure 1 and flow coefficient in the conventional centrifugal blower of bellmouth has not been set and the figure of the relation between the pressure coefficient.
Fig. 6 has shown centrifugal blower shown in Figure 1 and air quantity in the conventional centrifugal blower of bellmouth has not been set and the figure of the relation between the static pressure.
Fig. 7 is the vertical sectional view of traditional centrifugal blower.
Fig. 8 is the side view of centrifugal blower shown in Figure 7.
Fig. 9 is the partial sectional view of amplification of a part of the air inlet port of another traditional centrifugal blower.
Embodiment
Fig. 1 to 4 has shown centrifugal blower according to an embodiment of the invention.In this embodiment, centrifugal blower 1 is configured to can be used for the blower in the vehicle air conditioner.Centrifugal blower 1 has motor 2, and is configured to the biaxial type centrifugal blower.Be provided with sirocco fan 6 and 7 at the running shaft 3 of motor 2 and 4 place, end, they all have a plurality of blades 5.Described a plurality of blade 5 upwards be arranged in week each running shaft 3 and 4 around, as shown in Figure 4.Each running shaft 3 links to each other with a plurality of blades 5 by the driving plate 8 that forms the disk plate with 4, and driving plate 8 and blade 5 can rotate along the rotation of the predetermined direction shown in arrow among Fig. 4 with running shaft 3 and 4.Be provided with connecting ring 9 on the blade 5 of each sirocco fan 6 and 7, it is used for blade 5 is connected with each other, and strengthens and the formation that keeps being connected.
Sirocco fan 6 and 7 is contained in respectively in screw type shell 10 and 11.On shell 10, have air inlet port 12 and 13.Be discharged into the radially outer of sirocco fan 6 from the inner radial of sirocco fan 6 through air inlet port 12 and 13 inhaled airs.This exhausting air is sent in the unit heater (not shown) of air-conditioning system by flow path 14.Equally, on shell 11, have air inlet port 15 and 16.Be discharged into the radially outer of sirocco fan 7 from the inner radial of sirocco fan 7 through air inlet port 15 and 16 inhaled airs.This exhausting air is sent in the unit heater of air-conditioning system by flow path 17.
In each air inlet port 12,13,15 and 16, be provided with bellmouth 18,19,20 and 21.Each bellmouth 18,19,20 and 21 extends towards the outside of shell 10 or 11 from each air inlet port 12,13,15 and 16, and the diameter of each bellmouth increases towards the outside of shell.In addition, each bellmouth 18,19,20 and 21 and shell 10 or 11 form one.Each shell that is provided with each bellmouth for example can be formed by resin.
As illustrated in fig. 1 and 2, each shell 10 and 11 forms part 22 and 23 by two shells that can upwards separate each other in the footpath of sirocco fan 6 or 7 and forms.On each shell formation part 22 or 23, be provided with semicircular bellmouth and form part 24 or 25.Shell separately forms part 22 and 23 and has formed shell 10 or 11 by interconnecting, and has each round-shaped bellmouth by linking to each other with 25 forming shell 10 or bellmouth is formed part 24 at 11 o'clock, just can forming.
In addition, in this embodiment, shell forms part 22 and 23 and forms and can separate on the direction of arrow shown in Figure 2.Therefore, be designed to conform to by being used for the joint line that molding outer casing forms part 22 and 23 mould with strapping wires shown in Figure 2, just can form part 22 and 23 and easily be molded into bellmouth formation part 24 or 25 integratedly, need not use complicated mould structure such as slide mechanism etc. with shell.
In the centrifugal blower 1 of constructing like this, because the port of air inlet separately 12 in shell 10 and 11,13, be respectively equipped with the bellmouth 18 that diameter increases towards the outside of shell separately on 15 and 16,19,20 and 21, just can prevent suitably that therefore near the air each air inlet port from stopping and backflow, steady air current from each air inlet port to each enclosure is got off, and can reduce the pressure loss.Therefore, owing to the variation that can suppress, therefore can stabilize and increase the air blast performance, and keep required air blast performance because of the caused blow out air amount of variation that sucks air quantity.In addition, stop, therefore can be suppressed at the noise that is produced when sucking air, and can realize the blower of low noise owing to can prevent air.
Flow coefficient in above-mentioned centrifugal blower 1 and the conventional centrifugal blower 100 of not establishing bellmouth shown in Figure 7 and the relation between the pressure coefficient in Fig. 5, have been shown.In addition, air quantity (blow out air amount) in above-mentioned centrifugal blower 1 and the conventional centrifugal blower 100 of not establishing bellmouth shown in Figure 7 and the relation between the static pressure in Fig. 6, have been shown.Can be clear from Fig. 5, in this embodiment's centrifugal blower 1, compare with traditional centrifugal blower 100, even flow (flow coefficient) increases, the pressure loss also is restricted to less (it is higher that pressure coefficient keeps).In addition, can be clear from Fig. 6, in this embodiment's centrifugal blower 1, compare with traditional centrifugal blower 100, the usable range that is in resistance curve under the minimum load and the air-conditioning system between the resistance curve under the maximum load obtains enlarging, and presents the advantage that the air blast performance improves.
Therefore, the above-mentioned centrifugal blower 1 with each bellmouth has good performance.In addition, in this embodiment because bellmouth 18 and 19 forms one with shell 10, and bellmouth 20 and 21 with shell 11 formation one, so number of spare parts can not increase, can prevent increases caused cost increase because of number of spare parts.In addition, since can adopt the simple mould of no labyrinth such as slide mechanism side by side be molded into shell form part 22 and 23 and outward the bellmouth that extends of the outside of hull shape member form part 24 and 25, therefore can reduce molding costs significantly and be used for the cost of mfg. moulding die.
Though above-mentioned centrifugal blower 1 is the biaxial type centrifugal blower in introduction, yet the present invention also can be applicable to the single-shaft variant centrifugal blower.
Claims (4)
1. centrifugal blower, comprise and have a plurality of sirocco fans that rotate the blade that makes progress in axial week that are arranged on, and the shell that has held described sirocco fan, wherein, inhaled air is drawn onto radially outer by the part between the adjacent blades from inner radial by opening the air inlet port on described shell, it is characterized in that, on described air inlet port, be provided with the bellmouth that diameter increases towards the outside of described shell.
2. centrifugal blower according to claim 1 is characterized in that, described bellmouth and described shell form one.
3. centrifugal blower according to claim 1 is characterized in that, described shell can form part by a plurality of shells that can upwards separate each other in the footpath of described sirocco fan and form.
4. centrifugal blower according to claim 1 is characterized in that, described sirocco fan is arranged on each end of described running shaft and goes up to form the biaxial type fan.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002333953A JP2004169579A (en) | 2002-11-18 | 2002-11-18 | Centrifugal blower |
| JP333953/2002 | 2002-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1500995A true CN1500995A (en) | 2004-06-02 |
Family
ID=32171441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200310117907A Pending CN1500995A (en) | 2002-11-18 | 2003-11-18 | Centrifugal blower |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1420168B1 (en) |
| JP (1) | JP2004169579A (en) |
| CN (1) | CN1500995A (en) |
| DE (1) | DE60306733T2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434725C (en) * | 2004-09-28 | 2008-11-19 | 大金工业株式会社 | Blower and air conditioner |
| CN106640715A (en) * | 2016-10-20 | 2017-05-10 | 上海朗兹环保科技有限公司 | Air system device and air purifier |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4722555B2 (en) | 2004-07-09 | 2011-07-13 | サンデン株式会社 | Centrifugal blower |
| EP2314880B1 (en) * | 2008-07-10 | 2013-01-09 | Mitsubishi Electric Corporation | Sirocco fan and air conditioner using the same |
| CN103307039B (en) * | 2013-06-19 | 2015-08-26 | 上海酷风汽车部件有限公司 | A kind of device of double-shaft air blower assembling wind wheel |
| CN104696244A (en) * | 2015-03-09 | 2015-06-10 | 黎雅伟 | Dust filtering fan |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1875881A (en) * | 1931-01-27 | 1932-09-06 | American Blower Corp | Fan housing construction |
| US3846040A (en) * | 1972-06-16 | 1974-11-05 | D Dennis | Blower housing |
| SE9603762L (en) * | 1996-10-15 | 1998-04-16 | Pm Luft | Fan housing for supplying air to a ventilation system |
| JP2000016049A (en) * | 1998-07-08 | 2000-01-18 | Denso Corp | Blow unit |
| JP4185654B2 (en) * | 2000-08-04 | 2008-11-26 | カルソニックカンセイ株式会社 | Centrifugal multi-blade blower |
| KR100379020B1 (en) * | 2000-08-17 | 2003-04-08 | 대한민국 | Pasteuria penetrans 98-35 isolate parasiting on Meloidogyne arenaria and its isolation method |
-
2002
- 2002-11-18 JP JP2002333953A patent/JP2004169579A/en active Pending
-
2003
- 2003-11-10 DE DE2003606733 patent/DE60306733T2/en not_active Expired - Lifetime
- 2003-11-10 EP EP20030257081 patent/EP1420168B1/en not_active Expired - Fee Related
- 2003-11-18 CN CNA200310117907A patent/CN1500995A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100434725C (en) * | 2004-09-28 | 2008-11-19 | 大金工业株式会社 | Blower and air conditioner |
| CN106640715A (en) * | 2016-10-20 | 2017-05-10 | 上海朗兹环保科技有限公司 | Air system device and air purifier |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1420168B1 (en) | 2006-07-12 |
| JP2004169579A (en) | 2004-06-17 |
| EP1420168A1 (en) | 2004-05-19 |
| DE60306733T2 (en) | 2006-11-16 |
| DE60306733D1 (en) | 2006-08-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |